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[ostree] core: Support --owner-uid and --owner-gid options for commit

commit 11d57d63e391c736cfd538d8972252eec6b0719d
Author: Colin Walters <walters verbum org>
Date:   Sun Dec 18 17:36:46 2011 -0500

    core: Support --owner-uid and --owner-gid options for commit
    
    This allows us to more easily import user-built tarballs into
    a root-owned OSTree repo.

 src/libostree/ostree-repo.c    |   80 +++++++++++++++++++++++++++++++++++----
 src/libostree/ostree-repo.h    |   14 +++++++
 src/ostree/ot-builtin-commit.c |   18 ++++++++-
 tests/t0001-archive.sh         |   14 ++++++-
 4 files changed, 114 insertions(+), 12 deletions(-)
---
diff --git a/src/libostree/ostree-repo.c b/src/libostree/ostree-repo.c
index e6ca389..575c0e7 100644
--- a/src/libostree/ostree-repo.c
+++ b/src/libostree/ostree-repo.c
@@ -1342,10 +1342,30 @@ create_tree_variant_from_hashes (GHashTable            *file_checksums,
   return serialized_tree;
 }
 
+static GFileInfo *
+create_modified_file_info (GFileInfo               *info,
+                           OstreeRepoCommitModifier *modifier)
+{
+  GFileInfo *ret;
+
+  if (!modifier)
+    return (GFileInfo*)g_object_ref (info);
+
+  ret = g_file_info_dup (info);
+  
+  if (modifier->uid >= 0)
+    g_file_info_set_attribute_uint32 (ret, "unix::uid", modifier->uid);
+  if (modifier->gid >= 0)
+    g_file_info_set_attribute_uint32 (ret, "unix::gid", modifier->gid);
+
+  return ret;
+}
+
 static gboolean
 stage_directory_recurse (OstreeRepo           *self,
                          GFile                *base,
                          GFile                *dir,
+                         OstreeRepoCommitModifier *modifier,
                          GChecksum           **out_contents_checksum,
                          GChecksum           **out_metadata_checksum,
                          GCancellable         *cancellable,
@@ -1357,6 +1377,7 @@ stage_directory_recurse (OstreeRepo           *self,
   GChecksum *ret_contents_checksum = NULL;
   GFileEnumerator *dir_enum = NULL;
   GFileInfo *child_info = NULL;
+  GFileInfo *modified_info = NULL;
   GFile *child = NULL;
   GHashTable *file_checksums = NULL;
   GHashTable *dir_metadata_checksums = NULL;
@@ -1372,15 +1393,18 @@ stage_directory_recurse (OstreeRepo           *self,
   if (!child_info)
     goto out;
 
+  modified_info = create_modified_file_info (child_info, modifier);
+
   xattrs = ostree_get_xattrs_for_file (dir, error);
   if (!xattrs)
     goto out;
 
-  if (!stage_directory_meta (self, child_info, xattrs, &ret_metadata_checksum,
+  if (!stage_directory_meta (self, modified_info, xattrs, &ret_metadata_checksum,
                              cancellable, error))
     goto out;
   
   g_clear_object (&child_info);
+  g_clear_object (&modified_info);
 
   dir_enum = g_file_enumerate_children ((GFile*)dir, OSTREE_GIO_FAST_QUERYINFO, 
                                         G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
@@ -1400,6 +1424,9 @@ stage_directory_recurse (OstreeRepo           *self,
     {
       const char *name = g_file_info_get_name (child_info);
 
+      g_clear_object (&modified_info);
+      modified_info = create_modified_file_info (child_info, modifier);
+
       g_clear_object (&child);
       child = g_file_get_child (dir, name);
 
@@ -1408,7 +1435,7 @@ stage_directory_recurse (OstreeRepo           *self,
           GChecksum *child_dir_metadata_checksum = NULL;
           GChecksum *child_dir_contents_checksum = NULL;
 
-          if (!stage_directory_recurse (self, base, child, &child_dir_contents_checksum,
+          if (!stage_directory_recurse (self, base, child, modifier, &child_dir_contents_checksum,
                                         &child_dir_metadata_checksum, cancellable, error))
             goto out;
 
@@ -1425,7 +1452,7 @@ stage_directory_recurse (OstreeRepo           *self,
           ot_clear_gvariant (&xattrs);
           g_clear_object (&file_input);
 
-          if (g_file_info_get_file_type (child_info) == G_FILE_TYPE_REGULAR)
+          if (g_file_info_get_file_type (modified_info) == G_FILE_TYPE_REGULAR)
             {
               file_input = (GInputStream*)g_file_read (child, cancellable, error);
               if (!file_input)
@@ -1437,7 +1464,7 @@ stage_directory_recurse (OstreeRepo           *self,
             goto out;
 
           if (!stage_object (self, OSTREE_OBJECT_TYPE_RAW_FILE,
-                             child_info, xattrs, file_input, NULL,
+                             modified_info, xattrs, file_input, NULL,
                              &child_file_checksum, cancellable, error))
             goto out;
 
@@ -1468,6 +1495,7 @@ stage_directory_recurse (OstreeRepo           *self,
  out:
   g_clear_object (&dir_enum);
   g_clear_object (&child);
+  g_clear_object (&modified_info);
   g_clear_object (&child_info);
   g_clear_object (&file_input);
   if (file_checksums)
@@ -1492,6 +1520,7 @@ ostree_repo_commit_directory (OstreeRepo *self,
                               const char   *body,
                               GVariant     *metadata,
                               GFile        *dir,
+                              OstreeRepoCommitModifier *modifier,
                               GChecksum   **out_commit,
                               GCancellable *cancellable,
                               GError      **error)
@@ -1518,7 +1547,7 @@ ostree_repo_commit_directory (OstreeRepo *self,
   if (!ostree_repo_resolve_rev (self, parent, TRUE, &current_head, error))
     goto out;
 
-  if (!stage_directory_recurse (self, dir, dir, &root_contents_checksum, &root_metadata_checksum, cancellable, error))
+  if (!stage_directory_recurse (self, dir, dir, modifier, &root_contents_checksum, &root_metadata_checksum, cancellable, error))
     goto out;
 
   if (!do_commit_write_ref (self, branch, current_head, subject, body, metadata,
@@ -1548,9 +1577,11 @@ propagate_libarchive_error (GError      **error,
 }
 
 static GFileInfo *
-file_info_from_archive_entry (struct archive_entry  *entry)
+file_info_from_archive_entry_and_modifier (struct archive_entry  *entry,
+                                           OstreeRepoCommitModifier *modifier)
 {
   GFileInfo *info = g_file_info_new ();
+  GFileInfo *modified_info = NULL;
   const struct stat *st;
   guint32 file_type;
 
@@ -1576,7 +1607,11 @@ file_info_from_archive_entry (struct archive_entry  *entry)
       g_file_info_set_attribute_uint32 (info, "unix::rdev", st->st_rdev);
     }
 
-  return info;
+  modified_info = create_modified_file_info (info, modifier);
+
+  g_object_unref (info);
+  
+  return modified_info;
 }
 
 static gboolean
@@ -1742,6 +1777,7 @@ file_tree_import_recurse (OstreeRepo           *self,
 static gboolean
 import_libarchive (OstreeRepo           *self,
                    GFile                *archive_f,
+                   OstreeRepoCommitModifier *modifier,
                    char                **out_contents_checksum,
                    char                **out_metadata_checksum,
                    GCancellable         *cancellable,
@@ -1861,7 +1897,7 @@ import_libarchive (OstreeRepo           *self,
         }
 
       g_clear_object (&file_info);
-      file_info = file_info_from_archive_entry (entry);
+      file_info = file_info_from_archive_entry_and_modifier (entry, modifier);
 
       if (g_file_info_get_file_type (file_info) == G_FILE_TYPE_UNKNOWN)
         {
@@ -1969,6 +2005,7 @@ ostree_repo_commit_tarfile (OstreeRepo *self,
                             const char   *body,
                             GVariant     *metadata,
                             GFile        *path,
+                            OstreeRepoCommitModifier *modifier,
                             GChecksum   **out_commit,
                             GCancellable *cancellable,
                             GError      **error)
@@ -1996,7 +2033,7 @@ ostree_repo_commit_tarfile (OstreeRepo *self,
   if (!ostree_repo_resolve_rev (self, parent, TRUE, &current_head, error))
     goto out;
 
-  if (!import_libarchive (self, path, &root_contents_checksum, &root_metadata_checksum, cancellable, error))
+  if (!import_libarchive (self, path, modifier, &root_contents_checksum, &root_metadata_checksum, cancellable, error))
     goto out;
 
   if (!do_commit_write_ref (self, branch, current_head, subject, body, metadata,
@@ -2020,6 +2057,31 @@ ostree_repo_commit_tarfile (OstreeRepo *self,
 #endif
 }
 
+OstreeRepoCommitModifier *
+ostree_repo_commit_modifier_new (void)
+{
+  OstreeRepoCommitModifier *modifier = g_new0 (OstreeRepoCommitModifier, 1);
+  modifier->uid = -1;
+  modifier->gid = -1;
+
+  modifier->refcount = 1;
+
+  return modifier;
+}
+
+void
+ostree_repo_commit_modifier_unref (OstreeRepoCommitModifier *modifier)
+{
+  if (!modifier)
+    return;
+  if (!g_atomic_int_dec_and_test (&modifier->refcount))
+    return;
+
+  g_free (modifier);
+  return;
+}
+
+
 static gboolean
 iter_object_dir (OstreeRepo             *self,
                  GFile                  *dir,
diff --git a/src/libostree/ostree-repo.h b/src/libostree/ostree-repo.h
index 03f687b..0222a62 100644
--- a/src/libostree/ostree-repo.h
+++ b/src/libostree/ostree-repo.h
@@ -130,6 +130,18 @@ gboolean      ostree_repo_load_variant (OstreeRepo  *self,
                                         GVariant     **out_variant,
                                         GError       **error);
 
+typedef struct {
+  volatile gint refcount;
+  gpointer reserved[3];
+
+  gint uid;
+  gint gid;
+} OstreeRepoCommitModifier;
+
+OstreeRepoCommitModifier *ostree_repo_commit_modifier_new (void);
+
+void ostree_repo_commit_modifier_unref (OstreeRepoCommitModifier *modifier);
+
 gboolean      ostree_repo_commit_directory (OstreeRepo   *self,
                                             const char   *branch,
                                             const char   *parent,
@@ -137,6 +149,7 @@ gboolean      ostree_repo_commit_directory (OstreeRepo   *self,
                                             const char   *body,
                                             GVariant     *metadata,
                                             GFile        *base,
+                                            OstreeRepoCommitModifier *modifier,
                                             GChecksum   **out_commit,
                                             GCancellable *cancellable,
                                             GError      **error);
@@ -148,6 +161,7 @@ gboolean      ostree_repo_commit_tarfile (OstreeRepo   *self,
                                           const char   *body,
                                           GVariant     *metadata,
                                           GFile        *base,
+                                          OstreeRepoCommitModifier *modifier,
                                           GChecksum   **out_commit,
                                           GCancellable *cancellable,
                                           GError      **error);
diff --git a/src/ostree/ot-builtin-commit.c b/src/ostree/ot-builtin-commit.c
index 96287b2..61f62c6 100644
--- a/src/ostree/ot-builtin-commit.c
+++ b/src/ostree/ot-builtin-commit.c
@@ -36,6 +36,8 @@ static char *body;
 static char *parent;
 static char *branch;
 static gboolean tar;
+static gint owner_uid = -1;
+static gint owner_gid = -1;
 
 static GOptionEntry options[] = {
   { "subject", 's', 0, G_OPTION_ARG_STRING, &subject, "One line subject", "subject" },
@@ -45,6 +47,8 @@ static GOptionEntry options[] = {
   { "branch", 'b', 0, G_OPTION_ARG_STRING, &branch, "Branch", "branch" },
   { "parent", 'p', 0, G_OPTION_ARG_STRING, &parent, "Parent commit", "commit" },
   { "tar", 0, 0, G_OPTION_ARG_NONE, &tar, "Given argument is a tar file", NULL },
+  { "owner-uid", 0, 0, G_OPTION_ARG_INT, &owner_uid, "Set file ownership user id", "UID" },
+  { "owner-gid", 0, 0, G_OPTION_ARG_INT, &owner_gid, "Set file ownership group id", "GID" },
   { NULL }
 };
 
@@ -60,6 +64,7 @@ ostree_builtin_commit (int argc, char **argv, const char *repo_path, GError **er
   GVariant *metadata = NULL;
   GMappedFile *metadata_mappedf = NULL;
   GFile *metadata_f = NULL;
+  OstreeRepoCommitModifier *modifier = NULL;
 
   context = g_option_context_new ("[ARG] - Commit a new revision");
   g_option_context_add_main_entries (context, options, NULL);
@@ -126,16 +131,23 @@ ostree_builtin_commit (int argc, char **argv, const char *repo_path, GError **er
       goto out;
     }
 
+  if (owner_uid >= 0 || owner_gid >= 0)
+    {
+      modifier = ostree_repo_commit_modifier_new ();
+      modifier->uid = owner_uid;
+      modifier->gid = owner_gid;
+    }
+
   if (!tar)
     {
       if (!ostree_repo_commit_directory (repo, branch, parent, subject, body, metadata,
-                                         arg, &commit_checksum, NULL, error))
+                                         arg, modifier, &commit_checksum, NULL, error))
         goto out;
     }
   else
     {
       if (!ostree_repo_commit_tarfile (repo, branch, parent, subject, body, metadata,
-                                       arg, &commit_checksum, NULL, error))
+                                       arg, modifier, &commit_checksum, NULL, error))
         goto out;
     }
 
@@ -148,6 +160,8 @@ ostree_builtin_commit (int argc, char **argv, const char *repo_path, GError **er
     g_mapped_file_unref (metadata_mappedf);
   if (context)
     g_option_context_free (context);
+  if (modifier)
+    ostree_repo_commit_modifier_unref (modifier);
   g_clear_object (&repo);
   ot_clear_checksum (&commit_checksum);
   return ret;
diff --git a/tests/t0001-archive.sh b/tests/t0001-archive.sh
index 30fbe80..057930c 100755
--- a/tests/t0001-archive.sh
+++ b/tests/t0001-archive.sh
@@ -21,7 +21,7 @@ set -e
 
 . libtest.sh
 
-echo '1..6'
+echo '1..9'
 
 setup_test_repository "archive"
 echo "ok setup"
@@ -50,3 +50,15 @@ echo "ok local clone checkout"
 
 $OSTREE checkout -U test2 checkout-user-test2
 echo "ok user checkout"
+
+cd ${test_tmpdir}/checkout-test2
+$OSTREE commit -b test2-uid0 -s 'UID 0 test' --owner-uid=0 --owner-gid=0
+echo "ok uid0 commit"
+
+cd ${test_tmpdir}
+$OSTREE ls test2-uid0 /firstfile > uid0-ls-output.txt
+assert_file_has_content uid0-ls-output.txt "-00664 0 0      0 /firstfile" 
+echo "ok uid0 ls"
+
+$OSTREE checkout -U test2-uid0 checkout-user-test2-uid0
+echo "ok user checkout from uid 0"
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